Sick and possible teething

mamabear

My little guy has a very flem filled cough and is possibly also teething. But he usually eats 6oz every 3hrs to the dot from 6:30a to 7p. Well the last two days he’s has very little interest in eating and his taking maybe 3oz. Should I be concerned or is this okay? Not sure what to do I don’t want him to get dehydrated or starve. He doesn’t have a fever and is still happy.